Health & lifestyle
How does hydration affect exercise?
Why fluid balance matters and how sweat rates vary between people and conditions.
Broadly supportedEducational overview
Losing too much fluid can affect how you feel and perform, but needs vary enormously between people and conditions.
Measuring your own sweat rate beats any generic rule.
What we understand in general terms
- Sweat rates vary widely with heat, humidity, intensity and the individual.
- Both under- and over-drinking carry risks.
- Measuring body-weight change is a practical way to estimate fluid loss.
Open questions
- Individual fluid and electrolyte needs.
- How thirst compares with planned drinking for different people.
Evidence
Verified sources pending
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